/* ============================================================
   site.css - shared chrome for static pages served from
   /var/www/seocarousel (landing.html, playbook.html, ...).
   Tokens, base reset, container, logo, header, buttons, footer,
   eyebrow. Page-specific layout / hero / sections stay inline.
   ============================================================ */

:root {
  --color-bg-page:        #e4e4e4;
  --color-bg-surface:     #f6f6f6;
  --color-bg-inverse:     #0a0a0a;
  --color-text:           #0a0a0a;
  --color-text-muted:     #636363;
  --color-text-on-accent: #0a0a0a;
  --color-text-on-dark:   #ffffff;
  --color-border:         #aaaaaa;
  --color-accent:         #ff7020;
  --color-accent-dark:    #b45309;
  --color-error:          #b91c1c;

  --font-sans: 'Space Grotesk', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, monospace;

  --tracking-tight:  -0.03em;
  --tracking-normal: 0;
  --tracking-wide:   0.04em;
  --tracking-wider:  0.06em;

  --space-1:  4px;
  --space-2:  8px;
  --space-3:  12px;
  --space-4:  16px;
  --space-5:  20px;
  --space-6:  24px;
  --space-8:  32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --space-24: 96px;
  --space-32: 128px;

  --chamfer-sm: 6px;
  --chamfer-md: 10px;
  --chamfer-lg: 14px;

  --duration-fast:   150ms;
  --duration-base:   250ms;
  --duration-slow:   300ms;
  --duration-reveal: 600ms;
  --ease-default:    cubic-bezier(0.4, 0, 0.2, 1);
  --ease-spring:     cubic-bezier(0.16, 1, 0.3, 1);

  --container-max: 1536px;
  --header-height: 64px;
}

*, *::before, *::after { box-sizing: border-box; }
html { background: var(--color-bg-page); }
body {
  margin: 0;
  background: var(--color-bg-page);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { display: block; max-width: 100%; }
h1, h2, h3, h4, p { margin: 0; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  color: var(--color-accent);
}
.eyebrow::before {
  content: '\2022';
  color: var(--color-accent);
  margin-right: var(--space-2);
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 1.125rem;
  letter-spacing: var(--tracking-tight);
  text-transform: uppercase;
  color: var(--color-text);
}
.logo__icon {
  display: block;
  width: 28px;
  height: auto;
  flex-shrink: 0;
}

/* ============================================================
   HEADER (sticky)
   ============================================================ */
.header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--color-bg-page);
  border-bottom: 1px solid var(--color-border);
}
.header__inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-6);
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}
.header__left {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}
.header__nav {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* ============================================================
   BUTTON - chamfered system with 3 variants + sizes
   ============================================================ */
.button {
  position: relative;
  isolation: isolate;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 10px 18px;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
  white-space: nowrap;
  cursor: pointer;
  border: none;
  background: transparent;
  -webkit-tap-highlight-color: transparent;
  transition: color var(--duration-fast) var(--ease-default),
              transform var(--duration-fast) var(--ease-default);
}
.button:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}
.button:active { transform: translateY(1px); }
.button:disabled {
  cursor: not-allowed;
  opacity: 0.6;
}

.button--sm { padding: 6px 14px;  font-size: 0.75rem; }
.button--lg { padding: 14px 24px; font-size: 1rem; }
.button--xl { padding: 18px 32px; font-size: 1.125rem; }

.button--primary { color: var(--color-text-on-accent); }
.button--primary::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: -2;
  background: var(--color-accent);
  clip-path: polygon(var(--chamfer-md) 0, 100% 0, 100% calc(100% - var(--chamfer-md)), calc(100% - var(--chamfer-md)) 100%, 0 100%, 0 var(--chamfer-md));
  transition: background var(--duration-fast) var(--ease-default);
}
.button--primary::after {
  content: '';
  position: absolute;
  inset: 1.5px;
  z-index: -1;
  background: transparent;
  clip-path: polygon(calc(var(--chamfer-md) - 1px) 0, 100% 0, 100% calc(100% - (var(--chamfer-md) - 1px)), calc(100% - (var(--chamfer-md) - 1px)) 100%, 0 100%, 0 calc(var(--chamfer-md) - 1px));
  transition: background var(--duration-fast) var(--ease-default);
}
.button--primary:hover:not(:disabled)::after { background: var(--color-bg-page); }
.button--primary:active:not(:disabled)::before { background: var(--color-accent-dark); }

.button--secondary {
  color: var(--color-text);
  transition: color var(--duration-fast) var(--ease-default);
}
.button--secondary::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: -2;
  background: var(--color-text);
  clip-path: polygon(var(--chamfer-md) 0, 100% 0, 100% calc(100% - var(--chamfer-md)), calc(100% - var(--chamfer-md)) 100%, 0 100%, 0 var(--chamfer-md));
  transition: background var(--duration-fast) var(--ease-default);
}
.button--secondary::after {
  content: '';
  position: absolute;
  inset: 1.5px;
  z-index: -1;
  background: var(--color-bg-page);
  clip-path: polygon(calc(var(--chamfer-md) - 1px) 0, 100% 0, 100% calc(100% - (var(--chamfer-md) - 1px)), calc(100% - (var(--chamfer-md) - 1px)) 100%, 0 100%, 0 calc(var(--chamfer-md) - 1px));
  transition: background var(--duration-fast) var(--ease-default);
}
.button--secondary:hover { color: var(--color-text-on-dark); }
.button--secondary:hover::after { background: transparent; }

.button--tertiary {
  padding: var(--space-3) var(--space-5);
  color: var(--color-text);
}
.button--tertiary::before,
.button--tertiary::after {
  content: '';
  position: absolute;
  width: 9px;
  height: 9px;
  opacity: 0;
  transition: opacity var(--duration-fast) var(--ease-default);
  pointer-events: none;
}
.button--tertiary::before {
  top: 0; left: 0;
  border-top: 1.5px solid var(--color-accent);
  border-left: 1.5px solid var(--color-accent);
}
.button--tertiary::after {
  bottom: 0; right: 0;
  border-bottom: 1.5px solid var(--color-accent);
  border-right: 1.5px solid var(--color-accent);
}
.button--tertiary:hover { color: var(--color-accent); }
.button--tertiary:hover::before,
.button--tertiary:hover::after { opacity: 1; }

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  border-top: 1px solid var(--color-border);
  padding: var(--space-12) 0;
}
.footer__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}
.footer__copyright {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-text-muted);
}
.footer__legal {
  margin-top: var(--space-6);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border);
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: var(--space-5);
  font-family: var(--font-mono);
  font-size: 0.75rem;
}
.footer__legal a {
  color: var(--color-text-muted);
  transition: color var(--duration-fast) var(--ease-default);
}
.footer__legal a:hover { color: var(--color-text); }